Depletion forces induce visco-elasto-capillary thinning of non-Brownian suspensions - Archive ouverte HAL Access content directly
Journal Articles EPL - Europhysics Letters Year : 2016

Depletion forces induce visco-elasto-capillary thinning of non-Brownian suspensions

Abstract

Droplet pinch-off, which occurs when a drop of liquid detaches from a capillary, can be strongly modified in the presence of complex fluids such as polymer solutions and suspensions giving rise to long and slender filaments that thin slowly in time. While for polymers, the molecular conformations of the molecules in the filament are responsible for such a behavior, in suspensions the mechanisms at play remain to be deciphered. Here we show, experimentally, that while liquid bridges of non-Brownian suspensions of moderate concentrations have a thinning behavior very close to that of the solvent, the addition of short-chain polymers inducing depletion attractions between the particles in the suspension changes the thinning dynamics and gives rise to exponential thinning in time. The characteristic time of this dynamics increases with polymer concentration and therefore the intensity of the depletion forces at play. The tunability of this dynamics may be important for injket and 3D printing applications where short rupture times are sought for or in other situations where drop formation has to be minimized or inhibited.
Fichier principal
Vignette du fichier
HarichEPL2016_PostPrint.pdf (911.65 Ko) Télécharger le fichier
Origin Files produced by the author(s)
Comment Embargo de 12 mois imposé par l'éditeur pour le post-print
Loading...

Dates and versions

hal-01392221 , version 1 (04-11-2016)

Licence

Identifiers

Cite

R. Harich, A Deblais, A Colin, H. Kellay. Depletion forces induce visco-elasto-capillary thinning of non-Brownian suspensions. EPL - Europhysics Letters, 2016, 114 (5), pp.58006 (1-6). ⟨10.1209/0295-5075/114/58006⟩. ⟨hal-01392221⟩
246 View
166 Download

Altmetric

Share

Gmail Mastodon Facebook X LinkedIn More